Wrench.



J. BOULIEU.

WRENCH.

APPLICATION FILED snrw so, 1909.

972,052. Patented Oct. 4, 1910.

I WM/macaw a OFFICE...

JOHN BoULIEu, or snow s'rn. MARIE, MICHIGAN, nssrelvon or ONE-HALF rom'mn's' 3. RYAN, or sen /r s'rn. MABIELMICHIG-AN.

wnnnon.

Manse.

Patented on, 4., 1910.-

To ali whom it may concern; I

Be it known that 1, JOHN BoULm citizen of the United States, residing at Sault Ste. Marie, 1n the county of Chippewa and State of Michigamhave inventedcertain new and useful Improvements in Trenches, of which the following is. a specification.

This invention. comprehends certain new and useful improvements in" tools, and the invention has for its object a simple, durable and efficient-construction of wrench which will adapt itself in'a ready and expeditious manner to, a wide range of adjustments with;

out the necessity of any manual adjustment of,the parts, thesame being so arranged that I it will quickly and tightly grip the work,-

no matter what the character or size of the same may ,be, within the limits of the tool.

With this and other objectsin view as will more fully. appear as the description 'proceed s,---the' invention consists in -certain constructions; arrangements and combina- 'tions of the-parts that I shall'herein'after -"fully describe and claim.

For a full understanding of the invention, reference is to-be had ,tothe I following descripltiion "and Y accompanying drawings 111' 1c: Figure 1 is a perspective view of a wrench constructed in accordance with my invention; and, Fig. 2 is a side elevation thereof.

Corresponding and like partsare referred I to inthe following description and indicated {in all'the views of the'accompanying draw- I ings by the same reference characters.

Referring to the drawing, the numeral '1 designates the relatively stationary aw of my improvedwrench, the same being formed preferably 'integral with a shank'2 having flat and parallel opposite sides, the said extremity of which is preferably so shaped that it may form a screw driver as indicated at 4. 5 designates therelatlvely movable 45,-

jaw. This jaw is connected to the shank 1 by means of two pairs'of links 6 which are pivotally connected at their ends to the movingly curved, the toothed edge of the sta- 'tionary aw being convex, while the toothed edge'of the jaw 5 is concave, said last named jaw thereby having a somewhat 'hooked j formation. By-this exact character ofthe aws .and construction and arrangement of the parts, the toothed edges of the respective aws Wlll maintain a substantially parallel relation to-e'ach other in the adjustments of the wrench, so as to securely engage, a nut-"or the like, no matter what the size of the same may be within the limits of 'theiadjustability;

ofthe tool.". 1 I

In the "presentembodiment of the inventhe rear or upper edge of the shank 2, the

free'endof said spring bearing upon the 'the work. It isto be'understood that this spring is not for the pn'rpos'e of holding the jaws in a position to tightly grip the work after they have engaged the same, as the, formation of the connection between the jaws will perform this operation without any spring. The spring is mainly for the' purposeof movjn the jaw 5 into engage-' mentwith the-wor Y desired.

and may be omitted if I In order tolholdthe. movable jaw 5 from swinging upwardly beyond the limit. of its opening movement, the shank 2 is formed with oppositely extending lugs or nibs 8 tion, a plate spring 7 is secured at one end to i adapted to abut against the rear edges of the rearmost pair of links 6. These stops or lugs 8 guard the operator from injury to his fingers from the movable jaw dropping back beyond a predetermined position, and

also keep the movable jaw at aproper stopping point.

Among the advantages which may be mentioned for my improved wrench are the following: The wrench needs no adjustmentbut immediately adjusts itself to grip any size or shape of pipe or nut, answering all the purposes of a pipe wrench or monkey wrench without the necessity of any manual adjustment before applying the'jaws to the work. The spring 7 insures the permanent holding ofthe movable jaw when s using the wrench in close quarters, where it will obviously answer the purpose of -a' ratchet wrench. I

From the foregoing descript on in'connectionwith the accompanying drawing, the I operation of my improved wrench-will beapparent. Inthepractical use of the device, it 1S-0I1ly necessary to use one hand. By

simply setting thejmovable jaw up against i'the, nut or pipe and drawing the handle tionary jaw and a handle, a relatively mov able jaw, and two pairs of links pivotally connected-at their ends to the opposite sides of the movable jaw and shank respectively,

the shank beingyprovided on opposite; sides with laterally projecting stop lugs designed to engagethe rear edges of one pair oflinks.

- 2. The lrerein described wrench comprising a shank provided with a relatively sta- .tionary jaw and a handle, a movable jaw,

linkspivotally connecting the movable jaw to the shank, and a plate spring connected at one end to the rear edge of the shank,

the free end of the spring bearing against the rear end of the movable jaw.

3. The herein described wrench, comprising a shank provided with a relatively stationary jaw and a handle, and a rela-' tively movable jaw, two pairs of links pivotally connected at their ends to the opposite sides'of the movable jaw and shank respectively, the shank being provided on opposite sides with laterally projecting stop lugs'adapted to engage the rear pair of links to limit the swinging movement of the movable j aw-in one directiomand a plate spring connected at one end .to the rear edge of the shank just in rear of and between said lugs,

the free end of the spring bearing against the rear'end of the movable jaw.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN BOULIEU. [1 s] Witnesses ALICE BOULIEU, J. H. 'NEwHoUsE. v 

